Design and Fabrication of a Light Emitting Diode-Based Diffuser Sheet-less Light Guide Plate for Lighting Applications

被引:12
作者
Park, Yoon Ki [1 ]
Joo, Jae-Young [2 ]
Lee, ChaBum [1 ]
Lee, Sun-Kyu [1 ]
机构
[1] Gwangju Inst Sci & Technol, Sch Mechatron, Gwangju 500712, South Korea
[2] Korea Photon Technol Inst, Gwangju 500712, South Korea
基金
新加坡国家研究基金会;
关键词
Light guide plate; Light emitting diode; Diffuser sheet-free; Monte-Carlo ray tracing; BACKLIGHT; LUMINANCE; SURFACE; PATTERN; LENS;
D O I
10.1007/s12541-013-0136-5
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper presents the design and fabrication of a light emitting diode-based light guide plate to realize the diffuser sheet-less applications for an indoor lighting. The diffuser sheet has been used for distributing the luminous intensity in uniform over the target n area, but it leads to light loss and production cost. Here, a diffuser sheet-less LGP with high luminous efficiency and high spatial uniformity was designed by a Monte-Carlo ray tracing method and fabricated by an ultraprecision machining. Simulation results showed that the U-groove LGP has great potential to get rid of the diffuser sheet: efficiency of 70.5% (lm/lm) and uniform luminous intensity distribution of 145 at a viewing angle (C = 0) and 120 at a viewing angle (C = 90), respectively From the measurement results, it agreed with the simulation results. Thus, it was confirmed that the proposed LGP shows a good performance in terms of efficiency and a wide luminous intensity distribution, and a possibility to substitute for a diffuser-based illumination system.
引用
收藏
页码:1017 / 1022
页数:6
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